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Finding the Fourth Proportional to 388,363.08, 535,913.64 and 216,275.88

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Solution

The fourth proportional to 388,363.08, 535,913.64 and 216,275.88 is: 298,445.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,363.08 : 535,913.64 = 216,275.88 : x
  2. Step 2: Convert to fraction form
    388,363.08/535,913.64 = 216,275.88/x
  3. Step 3: Cross multiply
    388,363.08x = 535,913.64 × 216,275.88
  4. Step 4: Simplify right side
    388,363.08x = 115,905,194,095.00
  5. Step 5: Solve for x
    x = 115,905,194,095.00/388,363.08
  6. Step 6: Final answer
    x = 298,445.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.